Aroma diffuser



FIG. 1 is a top plan view of an aroma diffuser showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top perspective view thereof;

FIG. 8 is a bottom, rear and left side perspective view thereof;

FIG. 9 is an another top perspective view thereof;

FIG. 10 is an enlarged view of portion 32 in FIG. 3 ; and,

FIG. 11 is an enlarged view of portion 33 in FIG. 9 . 

CLAIM The ornamental design for an aroma diffuser, as shown and described. 